<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    html,
    body,
    #root {
      width: 100%;
      height: 100%;
      background: linear-gradient(180deg, #646fe6 0%, #2537f600 100%);

    }

    #loader-wrapper {
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 24px;
      position: fixed;
      width: 100%;
      height: 100%;
      z-index: 9999;

    }

    #loader {
      position: relative;
      display: block;
      width: 150px;
      height: 150px;
      border-radius: 50%;
      border: 3px solid transparent;
      border-top-color: #fff;
      -webkit-animation: spin 2s linear infinite;
      -ms-animation: spin 2s linear infinite;
      -moz-animation: spin 2s linear infinite;
      -o-animation: spin 2s linear infinite;
      animation: spin 2s linear infinite;
      z-index: 1001;
    }

    #loader:before {
      content: '';
      position: absolute;
      top: 5px;
      left: 5px;
      right: 5px;
      bottom: 5px;
      border-radius: 50%;
      border: 3px solid transparent;
      border-top-color: #fff;
      -webkit-animation: spin 3s linear infinite;
      -moz-animation: spin 3s linear infinite;
      -o-animation: spin 3s linear infinite;
      -ms-animation: spin 3s linear infinite;
      animation: spin 3s linear infinite;
    }

    #loader:after {
      content: '';
      position: absolute;
      top: 15px;
      left: 15px;
      right: 15px;
      bottom: 15px;
      border-radius: 50%;
      border: 3px solid transparent;
      border-top-color: #fff;
      -moz-animation: spin 1.5s linear infinite;
      -o-animation: spin 1.5s linear infinite;
      -ms-animation: spin 1.5s linear infinite;
      -webkit-animation: spin 1.5s linear infinite;
      animation: spin 1.5s linear infinite;
    }

    .loader-title {
      color: #fff;
      font-size: 19px;
      width: 100%;
      text-align: center;
      line-height: 40px;
    }

    @keyframes spin {
      0% {
        -webkit-transform: rotate(0deg);
        -ms-transform: rotate(0deg);
        transform: rotate(0deg);
      }

      100% {
        -webkit-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        transform: rotate(360deg);
      }
    }
  </style>
  <div id=loader-wrapper>
    <div id=loader></div>
    <div class=loader-title>正在加载系统资源，请耐心等待</div>
  </div>
</body>

</html>